Job Description

Senior Electronics / Embedded Hardware Engineer

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Own the electronics for our building automation platform, from the embedded Linux controller board to the RS-485 I/O modules it supervises. Take designs from concept through schematic, layout, prototype, compliance, production test and volume manufacture. Work alongside the firmware and platform team so hardware, I/O module firmware and the controller software evolve together.

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Key responsibilities

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Design and revise the controller hardware around an embedded Linux system-on-module: power input and protection, Ethernet PHY and magnetics, Wi-Fi module and antenna integration, RS-485 transceivers, RTC, storage and status indication.

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Design I/O module hardware: relay outputs, digital inputs, and universal inputs covering 0 to 10 V, 4 to 20 mA, thermistor and dry-contact sensing.

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Specify and validate RS-485 bus design including termination, biasing, isolation, surge protection and cable length limits for multi-drop installations.

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Write and maintain the microcontroller firmware for the I/O modules, including the serial protocol, CRC framing, and the in-field firmware update path used by the controller.

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Define power architecture for 24 V AC/DC field supply, brown-out and power-failure behaviour, and safe relay states on loss of power.

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Design and build production test rigs and bench fixtures: bed-of-nails or connector-based jigs, automated functional test sequences, calibration of analog channels, and pass/fail reporting.

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Support the software team's automated hardware-in-the-loop tests with fixtures that exercise real I/O, serial links and network interfaces.

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Run design verification: signal integrity on Ethernet and RS-485, RF performance of the Wi-Fi section, thermal, EMC pre-compliance, environmental and long-duration soak testing.

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Own the manufacturing hand-off: BOMs, assembly drawings, pick-and-place data, test procedures and firmware programming steps, and work with the contract manufacturer through pilot runs and yield issues.

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Manage component lifecycle, obsolescence and second sourcing across the product range.

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About you

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Degree in electrical or electronic engineering, or equivalent experience.

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Several years designing mixed-signal embedded hardware that has shipped in volume, including at least one product taken through contract manufacturing.

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Fluency with a professional EDA tool such as Altium or KiCad, including multi-layer and controlled-impedance layout.

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Experience integrating Ethernet PHYs and magnetics, and Wi-Fi modules with their antenna, matching and regulatory constraints.

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Hands-on experience with RS-485 or similar industrial serial buses, and with isolated, protected field I/O.

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Experience designing production test rigs and writing the test software that drives them.

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Embedded C for microcontrollers such as STM32 and ESP32, and comfort debffdugging protocol traffic with a scope and logic analyser.

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Working knowledge of switch-mode and linear power supply design and protection for industrial inputs.

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Familiarity with EMC, electrical safety and radio compliance requirements for industrial or building control equipment.

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Ability to write transparent specifications, test reports and manufacturing documentation.

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Nice to Have

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Experience integrating a Linux system-on-module onto a custom carrier board.

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Knowledge of BACnet, Modbus or other building automation protocols.

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Exposure to HVAC, lighting or energy metering applications and the sensors and actuators they use.

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Design for manufacture and test experience, including yield improvement with an external contract manufacturer.

📌 Senior Electronics / Embedded Hardware Engineer (Victoria)
🏢 CF Systems
📍 Victoria